Grinding tool guide



T. L. TAYLOR GRINDING TOOL GUIDE Filed Dec. 29, 1943 July 23, 1946.

MINI-Ill E 5 Sheets-Sheet l July 23; 1946. T. L- TAYLOR GRINDING TOOL GUIDE Filed Dec. 29, 1943 3 Sheets-Sheet 2 Thomas L July 23, 1 946. T. L. TAYLOR- I 2,404,604

GRINDING TOOL GUIDE Filed Dec. 29, 1945 a Sheetls-Sheet s nventor Patented July 23, l946 UNITED STATE s PATENT OFFICE GRINDING 'roonouipr.

Thomas L. Taylor, Detroit, Mich. Application December 29, 1943, Serial No. 516,079

' 3 Claims. 1

The present invention relates generally to the art of grinding the edge of plate steel through the medium of a pneumatically driven, handmanipulated grinding tool, and has for its primary object to provide, in a manner as hereinafter set forth, a guide for said tool comprising a novel construction and arrangement whereby the edge of the work may be expeditiously and uniformly ground.

Another very important object of the invention is to provide a guideof the aforementioned character'which will permit the edge of the work to be ground at any desired angle.

Still another important object of the invention is to provide a guide of the character described which is adapted to be readily adjusted to accommodate plate of substantially any size and thickness.

Other objects of the invention are to provide a grinding tool guide which will be comparatively simple in construction, strong, durable, highly eflicient and reliable in use, compact and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of thefollowing specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation of the portion of the device which carries the pneumatic grinding tool, certain portions thereof being removed.

Figure 2 is a view in front elevation thereof, certain parts being omitted.

Figure 3 is a top plan view.

Figure 4 is a view in front elevation of the usual guard of a grinding tool.

Figure 5 is a detail view in cross section, taken substantially on the'line 55 of Figure 1.

Figure 6 is a view in side elevation thereof.

Figure 7 is a view in horizontal section, taken substantially on the line 11 of Figure 2.

Figure 8 is a detail view in vertical section, taken substantially on the line 8-8 of Figure 1.

Figure 9 is a perspective view of one of the brackets.

Figure 10 is a detail view in vertical ection, taken substantially on the line III-I0 of Figure 6.

Referring now to the drawings in detail, and to Figures 6, 7 and 10 thereof in particular, it will be seen that reference character I designates a pair of angular metallic arms. On one end, 65 the bar 2 the arms I are provided with clamps 2 for securing said arms in position on a plate which isto be ground; In the embodiment shown, the clamps 2 comprise vertically spaced, opposed upper and lower jaws 3 and 4, respectively, which are integral with the arms I. The jaws 3 and 4 receive the plate therebetwe'enr "I'he'upper jaws 3 are threaded to accommodate thumb screws 5 which clamp the'arms I on the work in cooperation with the lower jaws 4.

At their other ends, the arms I terminate in vertical eyes 6. Secured by nuts I in the eyes 6 and depending from said eyes are hangers 8 in the form of vertical shafts. Set screws 9 releasably secure the hangers 8 against rotation in the eyes; 6. Substantially rectangular sleeves III are fixed. on the lower ends of the hangers 8. Mounted in the sleeves I0 is a'substantially channel-shaped guide II- of suitable metal. The sleeves ID are adjustable longitudinally on the guide II. Set screw I2 secure the sleeves II] in adjusted position on the guide II. It will thus be seen that the guide I I is mounted on the plate which is to be ground.

Referring now to Figures l, 2 and 3 of the drawings, it will be seen that reference character I3 designates generally what may be considered a carriage which is operable on the work. The carriage I 3 comprises metallic side plates I I which include forwardly projecting, comparatively short and long upper and lower arms I5 and I6, respectively, said upper and lower arms being spaced from each other for the reception of the marginal portion of the work therebetween. The side plates I I are secured at their rear end portions, as at I l, on the side members of a substantially U-shaped frame I8. The usual guard I9 of a conventional grinding tool 20 is secured at 2I for pivotal adjustment between the plates Fixed between the forward end portion of the arms I5 is a pair of spaced, parallel, transverse bars 22. Roller 23 are journaled between the bars 22 for engagement with the upper surface 8f the work.

Mounted beneath the forward end portions of the arms I6 is a metallic bar 24. A substantially U-shaped bar 25 is pivotally secured. at 26 between the arms I6 for vertical swinging movement. Extending between the leg of the substantially U-shaped bar 25 is a bar 21. Rollers 28 are journaled between the bars 25 and 21.

The rollers 28 are engageable beneath the work. Adjusting screws 29 are threadedly mounted in metallic 24 and engaged beneath the member 25 for raising and lowering the rollers 28 to accommodate plates of different thicknesses.

An arcuate, longitudinally adjustable brace or strut 30 is provided for vertically adjusting the tool 20 in the carriage I3 for grinding at different angles. The adjustable brace 30 comprises slidably adjustable sections 3! and 32 which are secured together by ascrew 34, The element 32 I is fixed to the front bar 22. The element 3| is secured at 33 on 'tdpyor the grinderguard 19. The screw 34 is threadedly mounted in the element 3i. screw 34.

A slot in the element 32 accommodates the Fixedbeneath the U frame I 8 and extendingh downwardly and rearwardly therefrom isan an 35. Aset screw 38 in the eye 3'! secures the yoke gular shank 35. A yoke 36 is adjustably mounte'd i on the rearwardly projecting portion-oftheshank 35. The yoke 36 comprises, at'an intermediatei' point, an eye 3! which accommodates the shank a 35in adjusted position,v Asillustrated to advan tage in Figure 10 of the drawings,- the legs of the yoke 3 6 terminate in reduced spindlesJ39 having journaled-thereon wheels or rollers 40. The wheels 48 are operable in the guide H.

It is thought that the manner in which the in- 3 vention functions will be readily apparentfrom I a consideration of the foregoing, Briefly; to grind a, straight edge, the'guide II is mounted on the 1 work through the medium of the hangers 8, the arms ,I, etcetera. The carriage I3 is then mounted on the plate which is received between the upper and lower arms l5 and I6. With the wheels 40 on the yoke-36 traveling in the guide II, the carriage I3 is manually fed on the platetwith the head 4| of the tool an engaged with the edgeto be ground.v The U frame l8 may be adjusted forwardly or rearwardly relativeto the yoke 36 I at. 31 for positioning the grinding tool properly relative-t0 the work. If a beveled edge is to be ground, the screw 34 is loosened to permit the tool 29 to be swung upwardly 0r downwardly to the desired position on the carriage l3. As here- ,inbefore stated, the adjusting screws 29 permit the rollers 28 to be raised or lowered for mounting the carriage l3 properly on plates of different thicknesses. The wheels 40- are movable vertically in the guide II to permit operation of the carriage I3 on warped or otherwise irregular plates. By loosening the screw 34 and swinging with the present invention will be readily under-'\ stood, and'although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrange- ;ment of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is: 1. Means for grinding the edge of plate steel "comprising, a carriage operable on a plate to be ground; said carriage including a pair of side plates, a grinding tool pivotally mounted for swinging adjustment between said plates, the plates including spaced arms for the reception of the Work therebetween, and rollers journaled on the arms and operable on the work.

2. Meansior grinding the edge of platesteel comprising, a carriage operable on a piece of work, said carriage including, aU frame, side plates mounted on said U, frame a grinding tool pivotally mounted between said side plates, the side plates including spaced arms for the reception of the work therebetween, pairs of bars extending between the arms, rollers journaled between said bars and operable'on the work, means for adjusting certain of the rollers toward or away from the work, and means for adjusting the grinding tool. about said pivotal mounting.

3. Meansfor grinding theedge of plate steel comprising, a pair of arms, means for detachably securing said arms on a piece of work, hangers depending from the arms, at substantially channel-shaped guide mounted on said hangers, a carriage operable on the work, said carriage including a U frame, side plates mounted on the U frame, rollers on the side plates operable on the opposite faces of the work, means for securing a grinding tool on the carriage for engagement with the work, a yoke mounted on the carriage, and wheels journaled on the yoke and operable in the guide.

' THOMAS L. TAYLOR. 

